SB2026090442 - Improper Initialization in Linux kernel cpu mce
Published: September 4, 2026
Security Bulletin ID
SB2026090442
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Initialization (CVE-ID: CVE-2026-80727)
CWE-ID: CWE-665 - Improper Initialization
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger kernel warnings.
The vulnerability exists due to improper initialization of the polling timer in x86 machine-check exception handling when CMCI storm detection runs during machine check initialization. A local user can trigger CMCI storm detection before the polling timer is initialized to trigger kernel warnings.
Remediation
Install update from vendor's website.